Which One of These Is a Disadvantage of Sensitivity Analysis

Which one of these is a disadvantage of sensitivity analysis?

A) Sensitivity analysis may decrease the false sense of security among managers.
B) Sensitivity analysis fails to identify the key variable that affects a project's net present value.
C) Each variable in sensitivity analysis is treated in isolation.
D) A sophisticated computer program is required to conduct sensitivity analysis.
E) Sensitivity analysis assumes most variables will achieve their most optimistic value.